Boiler.



No. 93|,839 PmntedAug. 29, |899.

' a. s. STRONG.

BDILER.

' v(Application led June 2, 1898.) l (No Modell) f 6 sheets-sheet 16-2 Ano/mfr.

Patented Aug. 29,1899.

G. S. STRONG.

B 0 I L E R.

(Application led June 2, 1898.)

6 Sheets-Sheet 2 (No Model.)

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No. 631,830. Patented Aug. 29, |899.

G. S. STRONG.

BolLEn.

(Application led June 2, 189B.)

(No Model.)

s sheets-sheet 4,

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No. 631,330. Patented Aug 29, |899.

G. s. NG.

1o v l (llo Model.) 6 Sheets-Sheet 5.

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Patented Aug. 29, 1899.

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B 0 I L E R.

(Application filed June 2, 1898.)

6 Sheets-Sheet 6.

(No Model.)

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UNITED STATES PATENT OEEICE.

GEORGE S. STRONG, OF NEI/V YORK, N. Y.

vBOILER.

s'PnciF'rcA'rro'N forming part yo'f Letters Patent No. 631,830, dated August 29, 1e9.

Application filed June 23 1898. Serial No. 682,398. (No model.)

Be it known that I, GEORGE S. STRONG, a 'citizen of the United States of America, resid; ingin the city, county, and State of New York, have invented a certain new and useful Improvement in Boilers, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to the construction of boilers, and has for its object to provide a boiler with great steam-generatin g power and with efficient and ample provision for the circulation of water in the boiler. I have also in view the economy of space occupied by the boiler and a construction which will make possible the use of plates lighter than would be commonly required in boilers of similar capacity.

In many of its features my improved boiler is suitable for stationary use and also for use as a locomotive-boiler; but primarily in the present application I have adapted my boiler for marine purposes, and particularly designed it for such use as that of the boiler of a torpedo-boat.

The nature of my improvements will be best understood as described in connection with the drawings in which they are illustrated, and in which- Y Figure 1 is a plan view showing two of my boilers arranged as for use in a torpedo-boat, a portion of the housing or covering being broken away to show the construction beneath. Fig. 2 is a side view, the part to the left in section, of the same construction shown in Fig. 1.v Fig. 3 is a front View, the part to the left in section, of the same construction. Fig. 4 is a longitudinal section taken as on the section-line 1 1 of Fig. 5, showing the construction of my boiler in somewhat greater detail. Fig. 5 is a front view, the part to the left in section, as on the line 2 2 of Fig. 4. Fig. 6 is a plan view, the upper part in section, as on the line 3 3 of Fig. 4. Fig. 7 is a plan view showing, 'on an enlarged scale, the construction of the headers used in my boiler.

, Fig. 8 is a section taken as on the line 4 4 of Figj?. Fig. 9 is a front view, the part to the left in section, showing a modified construction of the boiler. Fig. 10 is a longitudinal section of the same modiiication, and Fig. 11

is a longitudinal section showing still another permissible modification.

A and A' indicate, respectively, the front and rear headers,between which the fire-cham; ber of the boiler is situated, and which may be formed in any convenient way-for instance, as shown in Figs. 9 and 10,-,but preferably for use especially in the light marine boiler I form the headers as shown in Figs. 4, 6, 7, and S-that is, with the peripheries of the front and back plates united by means of an Adamson seam and with the portions of the body of the plate which are not stayed by tubes internally dished at frequent intervals, as shown at a2,'Fi'g. 8, the dished portions being united by rivets O,passing through tubular stays O. Awhich the edges of the plates are united,is well The Adamson seam, by

shown in Figs. 7 and 8, the anges ot' the -plates being indicated at a ct and the interposed strip of the seam, (indicated at ct,) O again indicating the rivets.

In my construction I unite the lateral sides of the headers A and A' by two sets of tubes (indicated at B B) and forming, or rather partly forming, the sides of the fire-chamber. The outer row of these sets of tubes B is preferably made to support an outer non-conducting wall, which is preferably made, as shown, of hollow tiling P, formed with airchannels p, leading from near the top down into the lire-chamber near the bottom, as shown. The air-conduits serve not only to keep the outside of the tiling walls reasonably cool, but also utilize the heat for preheating the air, or rather a portion of it, which enters the ireohamber. Preferably I make the two groups or sets of tubes B arch or incline inward over the grate, so as to aord an increased heating-surface as they extend upward, and preferably I increase the number of tubes at the upper part of each set, as shown, the plan I most approve for the marine boiler being that best indicated in Fig. 5.

I connect the upper part of the headers A and A by one or more conduits, forming, or rather partly forming, the top of the tire-chamber. I prefer to make these conduits in the form of drums, (indicated at 0,) and preferably use at least two such drums, a construction utilizing two drums being shown in l Figs. 9 and 10, while the marine boiler of' IOO Figs. 4 and 5 is shown as embodying two such drums, the drums being united to the headers through outwardly-turned iianges B2. In place of using drums C, I contemplate using in cases where heating-surface is desired to the maximum extent groups of tubes, as indicated at c in Fig. 1l; but` for most purposes drums, as indicated at C, will be found suf- Iicient and most satisfactory.

BB B3, &c., indicate the firedoors, extending through the front header and preferably formed with Adamson scams, as indicated in Fig. 4.

D indicates a boiler-shell which is secured, as by flanges B4, to the rear plate of the rear header A', and E indicates fore tubes extending through the shell D and by means of which the products of combustion are conducted away from the tire-chamber formed between the headers. Preferably, and particularly for the utilization of my invention in a marine boiler, the front sheet of the rear header is utilized as a tube-sheet, through which the tubes E pass and into which they are expanded. As the tire-chamber is large and the grate-surface extensive it is necessary that the aggregate area of the tubes E should be correspondingly large, and that the tubes should be set closer together than is ordinarily. the case, a construction which might tend to produce foaming in the shell D., and which renders it desirable, it' not necessary, that a circulation of the water through the shell should be provided for, which will avoid the tendency to foam. Such a circulation I secure by means of the diaphragm-partition K, which divides the water-space of the shell into two chambers connecting at top and bottom, as shown, and results in a circulation of the water downward on the right-hand side of the partition and on theleft-hand side of the partition partly upward around the tubes E an d4 partly forwa-rd through the tubes B, the last-.mentioned portion of the circulatin g water passing upwardy through the header uppel Part of the shell D. As shown, I have made the diaphragm K with a forwardly-extending tiange K' at top, such a construction` being found desirable in promoting the de.- sired circulation.

Where, as in the marine-boiler construction, as illustrated in` Figs. 4! and 5, the lateral tube sets B, B increase in number from the bottoml upward, as shown, it is desirable that provision should be made for insuring that a considerable volume of the flame and products ofr combustion should be forced throughy theinterspaces between these tubes, and, I preferably accomplish this not only by arching the upper portion of the tube sets B over the grate, but by providing a deilectingpartition, G, extending from a point above and atthe rear of the grate forward and up.- ward, as shown, and gradually diminishing in breadth. Such a partition should properly be constructed of fire-brick and snpopening M to the stack M3.

port-ed, as shown, on water-tubes F F, extending between the front and rear headers. It will be obvious that with such a partition in place a large portion of the products of combustion will be forced over the side edges of the partition and among the tubes B B. In constructions using the partition G it is also desirable that provision should be made for introducing air above and at the rear of the grate and between it and the rear header, a bridge-wall I leaving an air-passage I between the bridge-wall and the rear-header which opens througha passage I2 between the ,bridge-wall and the portion G. I3 indicates vision of walls L and L at the rear and overl the top of the boiler causes'the gas to pass through the conduits M and M in which the boiler is situated, as shown, and thence over the top of the division-plate L through the In the design shown where two boilers are placed back to back the partiti-on L serves to separate the flue-space of the two boilers, and the two partitions L are conveniently connected at top by an upwardly-extending partition L2, which directs the gases from both furnaces upward into the stack.

Having now described my invention what I claim. as new, and desire to secure by Letters Patent, is-

I. A boiler havingin combination front and 1 rear headers, as A A, between which the tiretwo sets of water-tubes, asB, connecting the` headers at their lateral sides and forming. the sides of thel fire-chambers, a boiler-shell directly connected to the back plate of the rear `header and through. the said header in direct com munication with the watei-tubesV and conduits connecting the headers, and a multiple series of tire-tubes extending through said shell through which the products of comvbustionv from the fire-chamber pass.

2. A boilerhavin g in combination front and` rear headers, as A A', between which the-tirechamber is situated, one or more conduits connecting the headers at top and forming-or partly form-ing the top of the tire-chamber, two sets of water-tubes, as B, connecting the headersfat their lateral sidesand forming the sides of the fire-chamber, a boiler-shell directly connected to the back plate of' the rear header and through-,said headerin directcommunication with the water-tubes and conduits connecting the headers, and a multipleseries of fire-tubes extendingthrou ghsaid shellfroln the front plate of the rear header through IIOv which the products of combustion from the tire-chamber pass.

3. A boiler having in combination front and :rear headers, as A A', between which the tirechamber is situated, one or more conduits connecting the headers at top and forming or partly forming the top of the tire-chamber, two sets of water-tubes, as B, connecting the headers at their lateral sides and forming the sides of the fire-chamber, a boiler-shell directly connected to the back plate of the rear header and through said header in direct communication with the water-tubes and conduits connecting the headers, a multiple series of lire tubes extending through said shell through which the products of combustion from the tire-chamber pass and hollow-tile walls for the fire-box supported on the tubes B and forming air-channels leading into the tire-box.

4. Aboiler having in combination front and rear headers, as A A', between which the tirechamber is situated, one or more conduits connecting the headers at top and forming or partly forming the top of the fire-chamber, two sets of water-tubes, as B B, connecting the lateral sides of the headers and arching over the grate, a boiler-shell directly connected to the back plate of the rear header and through the said header in direct communication with the water-tubes and conduits connecting the headers, and a multiple series of fire-tubes extending through said boiler-shell.

5. Aboiler having in combination front and rear headers, as A A', between which the lirechamber is situated, one or more conduits connecting the headers at top and forming or partly forming the top of the tire-chamber, two sets of water-tubes, as B B, connecting the lateral sides of the headers and arching over the grate, said set of tubes increasing in number and extending inward over the grate at their upper sections, a boiler-shell directly connected to the back plate of the rear header, and a multiple series of fire-tubes extending through said boiler-shell.

6. A boilerhaving in combination front and rear headers, as A A', between which the tirechamber is situated, one or more conduits connecting the headers at top and forming or partly forming the top of the tire-chamber,two sets of water-tubes, as B B connecting the lateral sides of the headers and arching over the grate, a deflecting-arch as G extending forward and upward over the grate and between the sets of tubes B B, a boiler-shell directl y connected to the back plate of the rear header, and a multiple series of tire-tubes extending through said boiler-shell.

7. A boiler havingin combination front and rear headers, as A A', between which the tirechamber is situated, one or more conduits connecting the headers at top and forming or partly forming the top of the ire-chamber,two sets of water-tubes, as B B, connecting the lateral sides of the headers and arching over the grate, a deflecting-arch, as G, extending forward and upward over the grate and between the sets of tubes B B, an air-opening as I' l2 at the rear end thereof, a boiler-shell,

directly connected to the back plate of the rear header, and a multiple series of tire-tubes extending through said boiler-shell.

8. Aboiler having in combination front and rear headers, as A A', between which the {irechamber is situated, one or more conduits connecting the headers at top and forming or partly forming the top of the tire-chamber, two sets of water-tubes, as B B, connecting the lateral sides of the headers, a boiler-shell directly connected to the back plate of the rear header, a multiple series of fire-tubes extending through said boiler-shell, and a detlectorplate K arranged across the shell to promote a circulation of the Water in it and around the fire-tubes.

9. Aboilerhavingin combinationfrontand rear headers, as A A', between which the tirechamber is situated, two or more steam and water drums connecting the headers at top and forming or partly forming the top of the tire-chamber, one or more steam-drums situated above the steam and water drums and each, connected with two of such drums, two sets of water-tubes connecting the lateral sides of the headers and forming or partly forming the sides of the tire-chamber, a boilershell D secured to the rear plate of the rear header and through the said header in direct communication with the water-tubes and conduits connecting the headers, and tire-tubes extending through said shell.

lO. A boiler-header, as A or A', having its front and rear walls united at the edge through a filling-piece against which edge anges of the plates rest and having said plates inwardly dished at intervals, and the dished portions secured together by rivets passing through tubular stays.

GEORGE S. STRONG.

Vitnesses:

CHARLES F. ZIEGLER, D. STEWART.

IOC) 

